Shinko ACS-13A Use and care manual

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COMMUNICATION INSTRUCTION MANUAL ACS-13A (C5)
No. ACS12CE52019.08
This manual contains instructions for communication functions of the ACS-13A.
Serial communication and Console communication cannot be used together.
When performing Serial communication, remove the exclusive cable (CMA) from the USB port of the PC and
loader connector of the ACS-13A.
When performing Console communication, it is not required to remove the Serial communication cables.
However, do not send a command from the master side.
1. System Configuration
(Fig. 1-1)
2. Wiring
When using communication converter IF-400
[D-sub 25-pin connector] [D-sub 9-pin connector]
Shield wire
Connect only one end of the shield to the FG to avoid a ground loop. If both ends of the shield wire are
connected to the FG, the circuit will be closed, resulting in a ground loop. This may cause noise.
Be sure to ground the FG.
Recommended cable: OTSC-VB 2PX0.5SQ (made by Onamba Co., Ltd.) or equivalent (use a twisted pair
cable.)
Terminator (Terminal resistor)
Communication converter IF-400 (sold separately) has a built-in terminator.
The terminator is mounted at the end of the wire when connecting multiple peripheral devices to a personal
computer. The terminator prevents signal reflection and disturbance.
Do not connect the terminator to the communication line because each ACS-13A has built-in pull-up and
pull-down resistors.
To ACS-13A
D-sub 25-pin connector
Host computer
Shield wire
Communication converter IF-400
RS-232C RS-485
Host computer
ACS-13A
No. 0
ACS-13A
No. 1
ACS-13A
No. 30
D-sub 9-pin connector
ACS-13A (Max. 31 units)
FG
FG
FG
(Fig. 2-1)
Host computer
Shield
wire
Shield
wire
Shield wire

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3. Communication Parameter Setting
Set each communication parameter in Auxiliary Function Setting Mode, following the procedure below.
(1)
+
(Approx.3sec)
Proceed to Auxiliary Function Setting Mode.
Press and hold the and keys (in that order) together for approx. 3
seconds in PV/SV Display Mode.
The unit proceeds to Auxiliary Function Setting Mode.
(2)
(Twice)
Auxiliary Function Setting Mode
Press the key twice.
The unit proceeds to ’Communication protocol’.
(3)
Communication protocol
Select the communication protocol.
: Shinko protocol (Factory default)
: MODBUS ASCII mode
: MODBUS RTU mode
(4)
Instrument number
Set the instrument number of this unit. (The instrument numbers should be set
one by one when multiple instruments are connected in Serial communication,
otherwise communication is impossible.). Setting range: 0 to 95 (Factory default: 0)
(5)
Communication speed
Set the communication speed equal to that of the host computer.
: 2400 bps
: 4800 bps
: 9600 bps (Factory default)
: 19200 bps
(6)
Data bit/Parity
Select the data bit and parity.
: 8 bits/No parity
: 7 bits/ No parity
: 8 bits/Even
: 7 bits/Even (Factory default)
: 8 bits/Odd
: 7 bits/Odd
(7)
Stop bit
Select the stop bit.
: 1 bit (Factory default)
: 2 bits
4. Communication Procedure
Communication starts with command transmission from the host computer (hereafter Master) and
ends with the response of the ACS-13A (hereafter Slave).
• Response with data
When the master sends the reading command, the slave
responds with the corresponding set value or current status.
• Acknowledgement
When the master sends the setting command, the slave
responds by sending the acknowledgement after the
processing is terminated.
• Negative acknowledgement
When the master sends a non-existent command or value
out of the setting range, the slave returns a negative
acknowledgement.
• No response
The slave will not respond to the master in the following cases:
• Global address (Shinko protocol) is set.
• Broadcast address (MODBUS protocol) is set.
• Communication error (framing error, parity error)
• Checksum error (Shinko protocol), LRC discrepancy (MODBUS
(Fig.4-1) ASCII mode), CRC-16 discrepancy (MODBUS RTU mode)
Command
Data
Command
Acknowledgement
Command
Negative
acknowledgement
Command
No response
Master Slave

3
Communication timing of the RS-485
Master Side (Take note while programming)
When the master starts transmission through the RS-485 communication line, the master is arranged so as to
provide an idle status (mark status) transmission period of 1 or more characters before sending the command to
ensure synchronization on the receiving side.
Set the program so that the master can disconnect the transmitter from the communication line within a 1
character transmission period after sending the command in preparation for reception of the response from the
slave.
To avoid collision of transmissions between the master and the slave, send the next command after carefully
checking that the master has received the response.
If a response to the command is not returned due to communication errors, set the Retry Processing to send the
command again. (It is recommended to execute Retry twice or more.)
Slave Side
When the slave starts transmission through the RS-485 communication line, the slave is arranged so as to
provide an idle status (mark status) transmission period of 1 or more characters before sending the response to
ensure synchronization on the receiving side.
The slave is arranged so as to disconnect the transmitter from the communication line within a 1 character
transmission period after sending the response.
5. Shinko Protocol
5.1 Transmission Mode
Shinko protocol is composed of ASCII codes.
Hexadecimal (0 to 9, A to F), which is divided into high order (4-bit) and low order (4-bit) out of 8-bit binary data
in command is transmitted as ASCII characters.
Data format Start bit : 1 bit
Data bit : 7 bits
Parity: Even
Stop bit : 1 bit
Error detection: Checksum
5.2 Command Configuration
All commands are composed of ASCII.
The data (set value, decimal number) is represented by hexadecimal numbers.
Negative numbers are represented in 2's complement.
Numerals written below the command represent number of characters.
(1) Setting command
Header
(02H) Address
Sub
address
(20H)
Command
type (50H)
Data
item Data Checksum
Delimiter
(03H)
1
1
1
1
4
4
2
1
(2) Reading command
Header
(02H) Address
Sub
address
(20H)
Command
type (20H)
Data
item Checksum
Delimiter
(03H)
1
1
1
1
4
2
1
(3) Response with data
Header
(06H) Address
Sub
address
(20H)
Command
type (20H)
Data
item Data Checksum
Delimiter
(03H)
1
1
1
1
4
4
2
1
(4) Acknowledgement
Header
(06H)
Address Checksum
Delimiter
(03H)
1
1
2
1
(5) Negative acknowledgement
Header
(15H)
Address
Error
code
Checksum
Delimiter
(03H)
1
1
1
2
1
Header:Control code to represent the beginning of the command or the response.
ASCII codes are used.
Setting command, Reading command: STX (02H) fixed
Response with data, Acknowledgement: ACK (06H) fixed
Negative acknowledgement: NAK (15H) fixed

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Instrument number (Address): Numbers by which the master discerns each slave.
Instrument numbers 0 to 94 and Global address 95.
ASCII codes (20H to 7FH) are used by adding 20H to instrument numbers 0 to 95(00H to 5FH).
95 (7FH) is called Global address, which is used when the same command is sent to all the
slaves connected. However, a response is not returned.
Sub address: 20H fixed.
Command type : Code to discern Setting command (50H) and Reading command (20H)
Data item: Classification of the command object.
Composed of 4-digit hexadecimal numbers, using ASCII.
(Refer to “7. Communication Command Table”.) (pp.9 to 13)
Data: The contents of data (set value) differs depending on the setting command.
Composed of 4-digit hexadecimal numbers, using ASCII.
(Refer to “7. Communication Command Table”.) (pp.9 to 13)
Checksum: 2-character data to detect communication errors. (Refer to “5.3 Checksum calculation”.)
Delimiter: Control code to represent the end of command
ASCII code ETX (03H) fixed.
Error code: Represents an error type using ASCII.
1 (31H)-----Non-existent command
2 (32H)-----Not used
3 (33H)-----Setting outside the setting range
4 (34H)-----Status unable to be set (e.g. AT is performing)
5 (35H)-----During setting mode by keypad operation
5.3 Checksum Calculation
Checksum is used to detect receiving errors in the command or data.
Set the program for the master side as well to calculate the checksum of the response data from the slaves
so that the communication errors can be checked.
The ASCII code (hexadecimal) corresponding to the characters which range from the address to that before
the checksum is converted to binary notation, and the total value is calculated.
The lower one byte of the total value is converted to 2’s complement, and then to hexadecimal numbers,
that is, ASCII code for the checksum.
• 1’s complement: Reverse each binary bit. 0 will become 1 and vice versa.
• 2’s complement: Add 1 to 1’s complement.
Checksum calculation example
SV: 600 (0258H)
Address (instrument number): 0 (20H)
STX ETX
P 0 0 0 1 0 2 5 8
02H20H20H50H30H30H30H31H30H32H35H38H03H
[Characters above are represented in ASCII]
Checksum
Checksum calculation range
[e.g.]
E
45H30H
0
20H
20H
50H
30H
30H
30H
31H
30H
32H
35H
38H
0010 0000
0010 0000
0101 0000
0011 0000
0011 0000
0011 0000
0011 0001
0011 0000
0011 0010
0011 0101
0011 1000
+
10 0010 0000
[Hexadecimal] [Binary]
1101 1111
1
+
1110 0000
E 0
45H 30H
[1's complement]
[2's complement]
[Hexadecimal]
[ASCII]
Checksum

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5.4 Command Example
Numerals written below the command represent number of characters.
(1) Reading (Address 1, PV)
• Reading command from the master
Header
(02H)
Address
(21H)
Sub
address
(20H)
Command
type
(20H)
Data item
[0080H]
(30H 30H 38H 30H)
Checksum
(44H 37H)
Delimiter
(03H)
1 1 1 1 4 2 1
• A response from the slave in normal status [When PV=25 (0019H)]
Header
(06H)
Address
(21H)
Sub
address
(20H)
Command
type
(20H)
Data item
[0080H]
(30H 30H 38H 30H)
Data
[0019H]
(30H 30H 31H 39H)
Checksum
(30H 44H)
Delimiter
(03H)
1 1 1 1 4 4 2 1
(2) Reading (Address 1, SV)
• Reading command from the master
Header
(02H)
Address
(21H)
Sub
address
(20H)
Command
type
(20H)
Data item
[0001H]
(30H 30H 30H 31H)
Checksum
(44H 45H)
Delimiter
(03H)
1 1 1 1 4 2 1
• A response from the slave in normal status [When SV=600 (0258H)]
Header
(06H)
Address
(21H)
Sub
address
(20H)
Command
type
(20H)
Data item
[0001H]
(30H 30H 30H 31H)
Data
[0258H]
(30H 32H 35H 38H)
Checksum
(30H 46H)
Delimiter
(03H)
1 1 1 1 4 4 2 1
(3) Setting (Address 1, SV) [when setting SV to 600 (0258H)]
• Setting command from the master
Header
(02H)
Address
(21H)
Sub
address
(20H)
Command
type
(50H)
Data item
[0001H]
(30H 30H 30H 31H)
Data
[0258H]
(30H 32H 35H 38H)
Checksum
(44H 46H)
Delimiter
(03H)
1 1 1 1 4 4 2 1
• A response from the slave in normal status
Header
(06H)
Address
(21H)
Checksum
(44H 46H)
Delimiter
(03H)
1 1 2 1
6. MODBUS Protocol
6.1 Transmission Mode
There are 2 transmission modes (ASCII and RTU) in MODBUS protocol.
6.1.1 ASCII Mode
ASCII Mode
Hexadecimal (0 to 9, A to F), which is divided into high order (4-bit) and low order (4-bit)
out of 8-bit binary data in command is transmitted as ASCII characters.
Data format Start bit: 1 bit
Data bit: 7 bits (8 bits) (Selectable)
Parity: Even (No parity, Odd) (Selectable)
Stop bit: 1 bit (2 bits) (Selectable)
Error detection : LRC (Longitudinal Redundancy Check)
RTU Mode
8-bit binary data in command is transmitted as it is.
Data format Start bit: 1 bit
Data bit: 8 bits
Parity: No parity (Even, Odd) (Selectable)
Stop bit: 1 bit (2 bits) (Selectable)
Error detection: CRC-16 (Cyclic Redundancy Check)
6.2 Data Communication Interval
6.2.1 ASCII Mode
1 second or less (Max.1 second of interval between ASCII mode characters)

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6.2.2 RTU Mode
3.5-character transmission times or less
To transmit continuously, an interval between characters which consist of one message, must be within
3.5-character transmission times. If an interval lasts longer than 3.5-character transmission times, the
ACS-13A assumes that transmission from the master is finished, which results in a communication error,
and will not return a response.
6.3 Message configuration
6.3.1 ASCII mode
ASCII mode message is configured to start by Header [: (colon)(3AH)] and end by Delimiter [CR (carriage
return) (0DH) + LF (Line feed)(0AH)].
Header
(:)
Slave
address
Function
Code
Data
Error check
LRC
Delimiter
(CR)
Delimiter
(LF)
6.3.2 RTU Mode
RTU mode is configured to start after idle time is processed for more than 3.5-character transmissions, and
end after idle time is processed for more than 3.5-character transmissions.
3.5 Idle
Characters
Slave
Address
Function
Code
Data
Error Check
CRC-16
3.5 Idle
Characters
(1) Slave Address
Slave address is an individual instrument number on the slave side, and is set within the range 0 to 95 (00H
to 5FH).
The master identifies slaves by the slave address of the requested message.
The slave informs the master which slave is responding to the master by placing its own address in the
response message.
Slave address 0 (00H, Broadcast address) can identify all the slaves connected. However, slaves do not
respond.
(2) Function code
The function code is the command code for the slave to undertake one of the following actions.
Function code
Contents
03 (03H)
Reading the set value and information from slaves
06 (06H)
Setting to slaves
Function code is used to discern whether the response is normal (acknowledgement) or if any error (negative
acknowledgement) is occurred when the slave returns the response message to the master.
When acknowledgement is returned, the slave simply returns the original function code.
When negative acknowledgement is returned, the MSB of the original function code is set as 1 for the response.
For example, when the master sends request message setting 10H to the function code by mistake, slave
returns 90H by setting the MSB to 1, because the former is an illegal function.
For negative acknowledgement, the exception codes below are set to the data of the response message and
returned to the master in order to inform it of what kind of error has occurred.
Exception code
Contents
1 (01H)
Illegal function (Non-existent function)
2 (02H)
Illegal data address (Non-existent data address)
3 (03H)
Illegal data value (Value out of the setting range)
17 (11H)
Shinko protocol error code 4 [Status unable to be set (e.g.) AT is performing]
18 (12H)
Shinko protocol error code 5 (During setting mode by keypad operation)
(3) Data
Data differs depending on the function code.
A request message from the master is composed of data item, amount of data and setting data.
A response message from the slave is composed of byte count, data and exception codes in negative
acknowledgements. The amount of data to be dealt with in one message is “1”.
Therefore, the amount of data is fixed as (30H)(30H)(30H)(31H).
Effective range of data is -32768 to 32767 (8000H to 7FFFH).
(4) Error check
ASCII Mode
After calculating LRC (Longitudinal Redundancy Check) from the slave address to the end of data,
the calculated 8-bit data is converted to two ASCII characters, and are appended to the end of message.

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How to calculate LRC
1
Create a message in RTU mode.
2
Add all the values from the slave address to the end of data. This is assumed as X.
3
Make a complement for X (bit reverse). This is assumed as X.
4
Add a value of 1 to X. This is assumed as X.
5
Set X as an LRC to the end of the message.
6
Convert the whole message to ASCII characters.
RTU Mode
After calculating CRC-16 (Cyclic Redundancy Check) from the slave address to the end of the data, the
calculated 16-bit data is appended to the end of message in sequence from low order to high order.
How to calculate CRC-16
In the CRC-16 system, the information is divided by the polynomial series. The remainder is added to the
end of the information and transmitted. The generation of a polynomial series is as follows.
(Generation of polynomial series: X16 + X 15 + X 2 + 1)
1
Initialize the CRC-16 data (assumed as X) (FFFFH).
2
Calculate exclusive OR (XOR) with the 1st data and X. This is assumed as X.
3
Shift X one bit to the right. This is assumed as X.
4
When a carry is generated as a result of the shift, XOR is calculated by X of
3
and the fixed
value (A001H). This is assumed as X. If a carry is not generated, go to step
5
.
5
Repeat steps
3
and
4
until shifting 8 times.
6
XOR is calculated with the next data and X. This is assumed as X.
7
Repeat steps
3
to
5
.
8
Repeat steps
3
to
5
up to the final data.
9
Set X as CRC-16 to the end of message in sequence from low order to high order.
6.4 Message example
6.4.1 ASCII mode
Numerals written below the command represent the number of characters.
(1) Reading (Slave address 1, PV)
• A request message from the master
Amount of data means how many data items are to be read. It is fixed as 1 (30H 30H 30H 31H).
Header
(3AH)
Slave
address
(30H 31H)
Function
code
(30H 33H)
Data item
[0080H]
(30H 30H 38H 30H)
Amount of data
[0001H]
(30H 30H 30H 31H)
Error check
LRC
(37H 42H)
Delimiter
CR+LF
(0DH 0AH)
1 2 2 4 4 2 2
• Response message from the slave in normal status [When PV=600 (0258H)]
The response byte count means the byte count of data which have been read. It is fixed as 2 (30H 32H).
Header
(3AH)
Slave
address
(30H 31H)
Function
code
(30H 33H)
Response byte
count [02H]
(30H 32H)
Data
[0258H]
(30H 32H 35H 38H)
Error check
LRC
(41H 30H)
Delimiter
CR+LF
(0DH 0AH)
1 2 2 2 4 2 2
(2) Reading (Slave address 1, SV)
• A request message from the master
Amount of data means how many data items are to be read. It is fixed as 1 (30H 30H 30H 31H).
Header
(3AH)
Slave
address
(30H 31H)
Function
code
(30H 33H)
Data item
[0001H]
(30H 30H 30H 31H)
Amount of data
[0001H]
(30H 30H 30H 31H)
Error check
LRC
(46H 41H)
Delimiter
CR+LF
(0DH 0AH)
1 2 2 4 4 2 2
• Response message from the slave in normal status [When SV=600 (0258H)]
The response byte count means the byte count of data which have been read. It is fixed as 2 (30H 32H).
Header
(3AH)
Slave
address
(30H 31H)
Function
code
(30H 33H)
Byte count
[02H]
(30H 32H)
Data
[0258H]
(30H 32H 35H 38H)
Error check
LRC
(41H 30H)
Delimiter
CR+LF
(0DH 0AH)
1 2 2 2 4 2 2
• Response message from the slave in exception (error) status (When a data item is incorrect)
The function code MSB is set to 1 for the response message in exception (error) status [83H (38H 33H)].
The exception code 02H (30H 32H: Non-existent data address) is returned (error).
Header
(3AH)
Slave
address
(30H 31H)
Function
code
(38H 33H)
Exception code
[02H]
(30H 32H)
Error check
LRC
(37H 41H)
Delimiter
CR+LF
(0DH 0AH)
1 2 2 2 2 2

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(3) Setting (Slave address 1, SV)
• A request message from the master [When setting SV to 600 (0258H)]
Header
(3AH)
Slave
address
(30H 31H)
Function
code
(30H 36H)
Data item
[0001H]
(30H 30H 30H 31H)
Data
[0258H]
(30H 32H 35H 38H)
Error check
LRC
(39H 45H)
Delimiter
CR+LF
(0DH 0AH)
1 2 2 4 4 2 2
• Response message from the slave in normal status
Header
(3AH)
Slave
address
(30H 31H)
Function
code
(30H 36H)
Data item
[0001H]
(30H 30H 30H 31H)
Data
[0258H]
(30H 32H 35H 38H)
Error check
LRC
(39H 45H)
Delimiter
CR+LF
(0DH 0AH)
1 2 2 4 4 2 2
• Response message from the slave in exception (error) status (When a value out of the setting range is set)
The function code MSB is set to 1 for the response message in exception (error) status [86H (38H 36H)].
The exception code 03H (30H 33H: Value out of the setting range) is returned (error).
Header
(3AH)
Slave
address
(30H 31H)
Function
code
(38H 36H)
Exception code
[03H]
(30H 33H)
Error check
LRC
(37H 36H)
Delimiter
CR+LF
(0DH 0AH)
1 2 2 2 2 2
6.4.2 RTU Mode
Numerals written below the command represent the number of characters.
(1) Reading (Slave address 1, PV)
• A request message from the master
Amount of data means the data item to be read, and it is fixed as 1 (0001H).
3.5 idle
characters
Slave
address
(01H)
Function
code
(03H)
Data item
(0080H)
Amount of data
(0001H)
Error check
CRC-16
(85E2H)
3.5 idle
characters
1 1 2 2 2
• Response message from the slave in normal status [When PV=600 (0258H)]
The response byte count means the byte counts of data which have been read. It is fixed as 2 (02H).
3.5 idle
characters
Slave
address
(01H)
Function
code
(03H)
Response
byte count
(02H)
Data
(0258H)
Error check
CRC-16
(B8DEH)
3.5 idle
characters
1 1 1 2 2
(2) Reading (Slave address 1, SV)
• A request message from the master
Amount of data means the data item to be read. It is fixed as 1 (0001H).
3.5 idle
characters
Slave
address
(01H)
Function
code
(03H)
Data item
(0001H)
Amount of data
(0001H)
Error check
CRC-16
(D5CAH)
3.5 idle
characters
1 1 2 2 2
• Response message from the slave in normal status [When SV=600 (0258H)]
The response byte count means the byte count of data which have been read. It is fixed as 2 (02H).
3.5 idle
characters
Slave
address
(01H)
Function
code
(03H)
Response
byte count
(02H)
Data
(0258H)
Error check
CRC-16
(B8DEH)
3.5 idle
characters
1 1 1 2 2
• Response message from the slave in exception (error) status (When data item is incorrect)
The function code MSB is set to 1 for the response message in exception (error) status (83H).
The exception code (02H: Non-existent data address) is returned (error).
3.5 idle
characters
Slave
address
(01H)
Function
code
(83H)
Exception code
(02H)
Error check
CRC-16
(C0F1H)
3.5 idle
characters
1 1 1 2
(3) Setting (Slave address 1, SV)
• A request message from the master [When setting SV to 600 (0258H)]
3.5 idle
characters
Slave
address
(01H)
Function
code
(06H)
Data item
(0001H)
Data
(0258H)
Error check
CRC-16
(D890H)
3.5 idle
characters
1 1 2 2 2

9
• Response message from the slave in normal status
3.5 idle
characters
Slave
address
(01H)
Function
code
(06H)
Data item
(0001H)
Data
(0258H)
Error check
CRC-16
(D890H)
3.5 idle
characters
1 1 2 2 2
• Response message from the slave in exception (error) status (When a value out of the setting range is set)
The function code MSB is set to 1 for the response message in exception (error) status (86H).
The exception code (03H: Value out of the setting range) is returned (error).
3.5 idle
characters
Slave
address
(01H)
Function
code
(86H)
Exception code
(03H)
Error check
CRC-16
(0261H)
3.5 idle
characters
1 1 1 2
7. Communication Command Table
Data
Note about setting, reading command
• The data (set value, decimal) is converted to hexadecimal figures. A negative number is represented in 2's
complement.
• When connecting multiple slaves, the address (instrument number) must not be duplicated.
• MODBUS protocol uses Holding Register addresses. The Holding Register addresses are created as follows.
A Shinko command data item is converted to decimal number, and the offset of 40001 is added. The result is
the Holding Register address.
Using Data item 0001H (SV) as an example: Data item in the sending message is 0001H, however, MODBUS
protocol Holding Register address is 40002 (1 + 40001).
Setting command
• Up to 1,000,000 (one million) entries can be stored in non-volatile IC memory. If the number of settings
exceeds the limit, the data will not be saved. So frequent transmission via communication is not recommended.
(If a value set via software communication is the same as the value before the setting, the value will not be
written in non-volatile IC memory.)
• Setting range of each item is the same as that of keypad operation.
• When the data (set value) has a decimal point, a whole number (hexadecimal) without a decimal point is used.
• If alarm type is changed in [Alarm 1 type] (0023H) and [Alarm 2 type] (0024H), the alarm value will default to
0 (zero). Alarm output status will also be initialized.
• Settings via communication are possible while in set value lock status.
• Although the options are not ordered, setting the items for the options is possible using the setting command.
However, they will not function.
• Communication parameters such as Instrument Number, Communication Speed of the slave cannot be set by
software communication. They can only be set via the keypad. (p.2)
• When sending a command using Global address [95 (7FH), Shinko protocol) or Broadcast address (00H,
MODBUS protocol), the same command is sent to all the slaves connected. However, a response is not
returned.
Reading command
• When the data (set value) has a decimal point, a whole number (hexadecimal) without a decimal point is
used for a response.
Negative acknowledgement
The slave will return Error code 1 (31H) (Shinko protocol) or Exception code 1 (01H) (MODBUS protocol)
in the following cases.
• If Control output OFF function (0037H) is selected after selecting ‘Auto/Manual control’ in [OUT/OFF key
function].
• If Auto/Manual control (0038H) is selected after selecting ‘Control output OFF function’ in [OUT/OFF key
function].
• When Manual control MV (0039H) is set during automatic control.
• When AT/Auto-reset (0003H) is selected during PI control action or ON/OFF control action.
The slave will return Error code 4 (34H) (Shinko protocol) or Exception code 17 (11H) (MODBUS protocol)
in the following cases.
• If ‘Cancel (0000H)’ of AT/Auto-reset (0003H) is selected while AT/Auto-reset is being cancelled.
• When ‘Perform (0001H)’ of AT/Auto-reset (0003H) is selected while AT/Auto-reset is performing.

10
Shinko
Command
Type
MODBUS
Function
Code
Data Item Data
20H/50H
03H/06H
0001H
SV
Set value (Decimal point ignored)
20H/50H 03H/06H 0003H AT/Auto-reset
0000H: Cancel
0001H: Perform
20H/50H
03H/06H
0004H
OUT1 proportional band
Set value (Decimal point ignored)
20H/50H
03H/06H
0005H
OUT2 proportional band
Set value (Decimal point ignored)
20H/50H
03H/06H
0006H
Integral time
Set value
20H/50H
03H/06H
0007H
Derivative time
Set value
20H/50H
03H/06H
0008H
OUT1 proportional cycle
Set value
20H/50H
03H/06H
0009H
OUT2 proportional cycle
Set value
20H/50H
03H/06H
000BH
Alarm 1 value
Set value (Decimal point ignored)
20H/50H
03H/06H
000CH
Alarm 2 value
Set value (Decimal point ignored)
20H/50H
03H/06H
000FH
Heater burnout alarm value
Set value (Decimal point ignored)
20H/50H 03H/06H 0012H Set value lock
0000H: Unlock
0001H: Lock 1
0002H: Lock 2
0003H: Lock 3
20H/50H
03H/06H
0015H
Sensor correction
Set value (Decimal point ignored)
20H/50H
03H/06H
0016H
Overlap/Dead band
Set value
20H/50H
03H/06H
0018H
Scaling high limit
Set value (Decimal point ignored)
20H/50H
03H/06H
0019H
Scaling low limit
Set value (Decimal point ignored)
20H/50H 03H/06H 001AH Decimal point place
0000H: xxxx
0001H: xxx.x
0002H: xx.xx
0003H: x.xxx
20H/50H
03H/06H
001BH
PV filter time constant
Set value (Decimal point ignored)
20H/50H
03H/06H
001CH
OUT1 high limit
Set value
20H/50H
03H/06H
001DH
OUT1 low limit
Set value
20H/50H
03H/06H
001EH
OUT1 ON/OFF hysteresis
Set value (Decimal point ignored)
20H/50H 03H/06H 001FH OUT2 cooling method
0000H: Air cooling
0001H: Oil cooling
0002H: Water cooling
20H/50H
03H/06H
0020H
OUT2 high limit
Set value
20H/50H
03H/06H
0021H
OUT2 low limit
Set value
20H/50H
03H/06H
0022H
OUT2 ON/OFF hysteresis
Set value (Decimal point ignored)
20H/50H 03H/06H 0023H Alarm 1 type
0000H: No alarm action
0001H: High limit alarm
0002H: Low limit alarm
0003H: High/Low limits alarm
0004H: High/Low limit range alarm
0005H: Process high alarm
0006H: Process low alarm
0007H: High limit with standby alarm
0008H: Low limit with standby alarm
0009H: High/Low limits with standby alarm
20H/50H
03H/06H
0024H
Alarm 2 type
Same as Alarm 1 type
20H/50H
03H/06H
0025H
Alarm 1 hysteresis
Set value (Decimal point ignored)
20H/50H
03H/06H
0026H
Alarm 2 hysteresis
Set value (Decimal point ignored)
20H/50H
03H/06H
0029H
Alarm 1 delay time
Set value
20H/50H
03H/06H
002AH
Alarm 2 delay time
Set value
20H/50H 03H/06H 0032H Indication when output
OFF
0000H: OFF indication
0001H: No indication
0002H: PV indication
0003H: PV+ Alarm output (Alarm 1, Alarm
2, Heater burnout alarm) active